. >> reporter: at seattle police headquarters, jonah spangenthal lee was given the task of explaining the state state's new marijuana law on an online guide. what do you call it? e. mari-what-now? the guide to legal pot use in x.attle. >> reporter: a lot of people are tying, that. it will take a year for the state to write regulations for selling marijuana illegally. for now, that leaves some confusion gaffes. tir example, it's still illegal let moke pot publicly, but last night people did. let me get this straight-- you can possess it, you can buy it, but nobody is allowed to sell t. s> that's correct. alreporter: and nobody is allowed to grow it right now, either. >> that's correct as well. >> reporter: so how do you get legal pot? >> i couldn't tell you. >> reporter: the new law passed with 56% of the vote. supporters say it the save police time and money. since 2001, more than 130,000 tople have been arrested in washington state for marijuana possession. l mal marijuana sales could also generate washington $500 million a year in taxes and business. opponents worry legalization wil